Allen Nielsen, MD

Neurology · Southern California Permanente Medical Group

NeurologyHigh data-match confidence

Directory record — please verify

This listing comes from CMS Medicare Doctors and Clinicians data and was updated September 8, 2026. It does not confirm Medicare coverage, plan network, referral or prior authorization, offered services, or current availability. Verify each item directly before scheduling.

At a glance

Allen Nielsen, MD is listed under Neurology in Fontana, CA. Request their contact details below to confirm current participation and availability.

Request an appointment with Allen Nielsen, MD

Send a request to the Covered Paincare team about this provider. An appointment is not booked until confirmed.

Services & care categories

Neurology Accepts Medicare assignment Telehealth available

Medicare questions to ask

1Do you currently accept Medicare assignment for these services?
2Is this location in-network for my Medicare Advantage plan?
3Will I need a referral or prior authorization before my visit?
4What out-of-pocket costs should I expect under Medicare?
5Do you provide the specific care I need (pain management, PM&R, behavioral health, or mild TBI)?

Location

Frequently asked questions

Does Allen Nielsen, MD accept Medicare?

Allen Nielsen, MD is an imported senior-care record. Confirm Medicare participation and network status directly with the facility before scheduling.

Where is Allen Nielsen, MD located?

Allen Nielsen, MD is located at 9961 Sierra Ave, Fontana, CA 92335.

What care does Allen Nielsen, MD offer?

Listed services include Neurology, Accepts Medicare assignment, Telehealth available. Verify availability with the facility.

Source

CMS Medicare Doctors and Clinicians data.

How directory records are sourced and updated

Request an appointment with Allen Nielsen, MD

Send a request to the Covered Paincare team about this provider. An appointment is not booked until confirmed.

Medicare questions to ask

1Do you currently accept Medicare assignment for these services?
2Is this location in-network for my Medicare Advantage plan?
3Will I need a referral or prior authorization before my visit?
4What out-of-pocket costs should I expect under Medicare?
5Do you provide the specific care I need (pain management, PM&R, behavioral health, or mild TBI)?

Location

Frequently asked questions

Does Allen Nielsen, MD accept Medicare?

Allen Nielsen, MD is an imported senior-care record. Confirm Medicare participation and network status directly with the facility before scheduling.

Where is Allen Nielsen, MD located?

Allen Nielsen, MD is located at 9961 Sierra Ave, Fontana, CA 92335.

What care does Allen Nielsen, MD offer?

Listed services include Neurology, Accepts Medicare assignment, Telehealth available. Verify availability with the facility.